The Outdoors Professional 40-Oz. Black Tumbler's double-walled, vacuum-insulated technology will keep iced drinks cold for up to 48 hours, no-ice drinks chilled up to 11 hours, and hot drinks hot for up to 7 hours! No more settling for lukewarm sips or diluted flavors! If you're on the go, this tumbler is built to fit any standard cup-holder. These tumblers are lightweight and durable. Crafted with stainless steel that is 100% BPA-free and nontoxic, this tumbler is built to withstand the rigors of everyday use, ensuring its durability for years to come. This tumbler features a screw-on splashproof straw lid to avoid spills and leaks. It's not only lightweight and easy to carry but super easy to clean. Hand-washing is a breeze as the wide mouth allows for effortless access to every nook and cranny. It's also dishwasher-friendly: simply toss it in, let the dishwasher work its magic, and have a sparkling clean tumbler!